| 摘要 |
PCT No. PCT/SE88/00191 Sec. 371 Date Nov. 29, 1989 Sec. 102(e) Date Nov. 29, 1989 PCT Filed Apr. 13, 1988 PCT Pub. No. WO88/07955 PCT Pub. Date Oct. 20, 1988.A coupling for a bicycle provided with a pedal operated brake actuator (8) which is separated from the drive chain, comprising a first freewheel coupling (8) which is associated with the pedal assembly for torque transfer to the brake actuator (8) at reverse rotation of the pedal crank, and a second freewheel coupling (43; 64; 143) for torque transfer to the drive wheel at forward rotation of the pedal crank, and a third freewheel coupling which is associated with the drive wheel and arranged to deactivate either of said first freewheel coupling or said second freewheel coupling (43; 64; 143) by means of a shifter (30; 65; 130) at reverse rotation of the drive wheel. A slip clutch (35, 36; 67, 69; 135, 136) is arranged to enable greater freedom of rotation as said third freewheel coupling is engaged.
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